Use our tutorial's checklist to improve our classical simulators tutorials

[y4izus]

Using our tutorial's checklist, make sure that classical simulators tutorials has the quality we want, and if not, improve them:

• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1426
• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1427
• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1428
• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1429
• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1430
• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1431
• [ ] https://github.com/Qiskit/qiskit-tutorials/issues/1432